Mercurial > hg
view tests/test-symlinks.t @ 30435:b86a448a2965
zstd: vendor python-zstandard 0.5.0
As the commit message for the previous changeset says, we wish
for zstd to be a 1st class citizen in Mercurial. To make that
happen, we need to enable Python to talk to the zstd C API. And
that requires bindings.
This commit vendors a copy of existing Python bindings. Why do we
need to vendor? As the commit message of the previous commit says,
relying on systems in the wild to have the bindings or zstd present
is a losing proposition. By distributing the zstd and bindings with
Mercurial, we significantly increase our chances that zstd will
work. Since zstd will deliver a better end-user experience by
achieving better performance, this benefits our users. Another
reason is that the Python bindings still aren't stable and the
API is somewhat fluid. While Mercurial could be coded to target
multiple versions of the Python bindings, it is safer to bundle
an explicit, known working version.
The added Python bindings are mostly a fully-featured interface
to the zstd C API. They allow one-shot operations, streaming,
reading and writing from objects implements the file object
protocol, dictionary compression, control over low-level compression
parameters, and more. The Python bindings work on Python 2.6,
2.7, and 3.3+ and have been tested on Linux and Windows. There are
CFFI bindings, but they are lacking compared to the C extension.
Upstream work will be needed before we can support zstd with PyPy.
But it will be possible.
The files added in this commit come from Git commit
e637c1b214d5f869cf8116c550dcae23ec13b677 from
https://github.com/indygreg/python-zstandard and are added without
modifications. Some files from the upstream repository have been
omitted, namely files related to continuous integration.
In the spirit of full disclosure, I'm the maintainer of the
"python-zstandard" project and have authored 100% of the code
added in this commit. Unfortunately, the Python bindings have
not been formally code reviewed by anyone. While I've tested
much of the code thoroughly (I even have tests that fuzz APIs),
there's a good chance there are bugs, memory leaks, not well
thought out APIs, etc. If someone wants to review the code and
send feedback to the GitHub project, it would be greatly
appreciated.
Despite my involvement with both projects, my opinions of code
style differ from Mercurial's. The code in this commit introduces
numerous code style violations in Mercurial's linters. So, the code
is excluded from most lints. However, some violations I agree with.
These have been added to the known violations ignore list for now.
author | Gregory Szorc <gregory.szorc@gmail.com> |
---|---|
date | Thu, 10 Nov 2016 22:15:58 -0800 |
parents | 4d2b9b304ad0 |
children | 96ca817ec192 |
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#require symlink == tests added in 0.7 == $ hg init test-symlinks-0.7; cd test-symlinks-0.7; $ touch foo; ln -s foo bar; ln -s nonexistent baz import with add and addremove -- symlink walking should _not_ screwup. $ hg add adding bar adding baz adding foo $ hg forget bar baz foo $ hg addremove adding bar adding baz adding foo commit -- the symlink should _not_ appear added to dir state $ hg commit -m 'initial' $ touch bomb again, symlink should _not_ show up on dir state $ hg addremove adding bomb Assert screamed here before, should go by without consequence $ hg commit -m 'is there a bug?' $ cd .. == fifo & ignore == $ hg init test; cd test; $ mkdir dir $ touch a.c dir/a.o dir/b.o test what happens if we want to trick hg $ hg commit -A -m 0 adding a.c adding dir/a.o adding dir/b.o $ echo "relglob:*.o" > .hgignore $ rm a.c $ rm dir/a.o $ rm dir/b.o $ mkdir dir/a.o $ ln -s nonexistent dir/b.o $ mkfifo a.c it should show a.c, dir/a.o and dir/b.o deleted $ hg status M dir/b.o ! a.c ! dir/a.o ? .hgignore $ hg status a.c a.c: unsupported file type (type is fifo) ! a.c $ cd .. == symlinks from outside the tree == test absolute path through symlink outside repo $ p=`pwd` $ hg init x $ ln -s x y $ cd x $ touch f $ hg add f $ hg status "$p"/y/f A f try symlink outside repo to file inside $ ln -s x/f ../z this should fail $ hg status ../z && { echo hg mistakenly exited with status 0; exit 1; } || : abort: ../z not under root '$TESTTMP/x' $ cd .. == cloning symlinks == $ hg init clone; cd clone; try cloning symlink in a subdir 1. commit a symlink $ mkdir -p a/b/c $ cd a/b/c $ ln -s /path/to/symlink/source demo $ cd ../../.. $ hg stat ? a/b/c/demo $ hg commit -A -m 'add symlink in a/b/c subdir' adding a/b/c/demo 2. clone it $ cd .. $ hg clone clone clonedest updating to branch default 1 files updated, 0 files merged, 0 files removed, 0 files unresolved == symlink and git diffs == git symlink diff $ cd clonedest $ hg diff --git -r null:tip diff --git a/a/b/c/demo b/a/b/c/demo new file mode 120000 --- /dev/null +++ b/a/b/c/demo @@ -0,0 +1,1 @@ +/path/to/symlink/source \ No newline at end of file $ hg export --git tip > ../sl.diff import git symlink diff $ hg rm a/b/c/demo $ hg commit -m'remove link' $ hg import ../sl.diff applying ../sl.diff $ hg diff --git -r 1:tip diff --git a/a/b/c/demo b/a/b/c/demo new file mode 120000 --- /dev/null +++ b/a/b/c/demo @@ -0,0 +1,1 @@ +/path/to/symlink/source \ No newline at end of file == symlinks and addremove == directory moved and symlinked $ mkdir foo $ touch foo/a $ hg ci -Ama adding foo/a $ mv foo bar $ ln -s bar foo $ hg status ! foo/a ? bar/a ? foo now addremove should remove old files $ hg addremove adding bar/a adding foo removing foo/a commit and update back $ hg ci -mb $ hg up '.^' 1 files updated, 0 files merged, 2 files removed, 0 files unresolved $ hg up tip 2 files updated, 0 files merged, 1 files removed, 0 files unresolved $ cd .. == root of repository is symlinked == $ hg init root $ ln -s root link $ cd root $ echo foo > foo $ hg status ? foo $ hg status ../link ? foo $ hg add foo $ hg cp foo "$TESTTMP/link/bar" foo has not been committed yet, so no copy data will be stored for bar. $ cd .. $ hg init b $ cd b $ ln -s nothing dangling $ hg commit -m 'commit symlink without adding' dangling abort: dangling: file not tracked! [255] $ hg add dangling $ hg commit -m 'add symlink' $ hg tip -v changeset: 0:cabd88b706fc tag: tip user: test date: Thu Jan 01 00:00:00 1970 +0000 files: dangling description: add symlink $ hg manifest --debug 2564acbe54bbbedfbf608479340b359f04597f80 644 @ dangling $ readlink.py dangling dangling -> nothing $ rm dangling $ ln -s void dangling $ hg commit -m 'change symlink' $ readlink.py dangling dangling -> void modifying link $ rm dangling $ ln -s empty dangling $ readlink.py dangling dangling -> empty reverting to rev 0: $ hg revert -r 0 -a reverting dangling $ readlink.py dangling dangling -> nothing backups: $ readlink.py *.orig dangling.orig -> empty $ rm *.orig $ hg up -C 1 files updated, 0 files merged, 0 files removed, 0 files unresolved copies $ hg cp -v dangling dangling2 copying dangling to dangling2 $ hg st -Cmard A dangling2 dangling $ readlink.py dangling dangling2 dangling -> void dangling2 -> void Issue995: hg copy -A incorrectly handles symbolic links $ hg up -C 0 files updated, 0 files merged, 0 files removed, 0 files unresolved $ mkdir dir $ ln -s dir dirlink $ hg ci -qAm 'add dirlink' $ mkdir newdir $ mv dir newdir/dir $ mv dirlink newdir/dirlink $ hg mv -A dirlink newdir/dirlink $ cd ..